40Б) помогите с решением

Решите задачу:

$tg(4x-\frac{\pi }{6})\leq0\\\\-\frac{\pi }{2}+\pi n\leq4x-\frac{\pi }{6}<\pi n,n\in Z\\\\-\frac{\pi }{2}+\frac{\pi }{6}+\pi n\leq4x<\frac{\pi }{6}+\pi n,n\in Z\\\\-\frac{\pi }{3}+\pi n\leq4x<\frac{\pi }{6}+\pi n,n\in Z\\\\-\frac{\pi }{12} +\frac{\pi n }{4}\leq x\leqx <\frac{\pi }{24}+\frac{\pi n }{4},n\in Z\\\\x\in[-\frac{\pi }{12} +\frac{\pi n }{4};\frac{\pi }{24}+\frac{\pi n }{4}),n\in Z$